| Rank | Parameter | Description | Initial range |
| 1 | r__CN2.mgt | SCS runoff curve number | −0.5 to 0.5 |
| 2 | v__GW_DELAY.gw | Groundwater delay | 0 to 400 |
| 3 | v__ALPHA_BF.gw | Base flow alpha factor | −0.5 to 0.5 |
| 4 | r__GWQMN.gw | Threshold depth of water in the shallow aquifer required for return flow to occur | 0 to 1 |
| 5 | r__GW_REVAP.gw | Groundwater “revap” coefficient | −0.5 to 0.5 |
| 6 | r__REVAPMN.gw | Threshold depth of water in the shallow aquifer for “revap” to occur | −0.5 to 0.5 |
| 7 | v__SFTMP.bsn | Snowfall temperature | −0.5 to 0.5 |
| 8 | v__SMTMP.bsn | Snow melt base temperature | −10 to 10 |
| 9 | v__SMFMX.bsn | Maximum melt rate for snow during year | −10 to 10 |
| 10 | v__SMFMN.bsn | Minimum melt rate for snow during the year | 0 to 10 |
| 11 | r__ESCO.hru | Soil evaporation compensation factor | −0.5 to 0.5 |